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ANSI/ASHRAE Standard 55: Thermal Environmental Conditions for Human Occupancy is an American National Standard published by ASHRAE that establishes the ranges of indoor environmental conditions to achieve acceptable thermal comfort for occupants of buildings. It was first published in 1966, and since 2004 has been updated every three to six years.
[23] [24] [25] ASHRAE 55-2017 defines metabolic rate as the rate of transformation of chemical energy into heat and mechanical work by metabolic activities of an individual, per unit of skin surface area. [1]: 3 Metabolic rate is expressed in units of met, equal to 58.2 W/m² (18.4 Btu/h·ft²).
There is a growing consumer and governmental interest in natural cleaning products and green cleaning methods. The use of nontoxic household chemicals is growing as consumers become more informed about the health effects of many household chemicals, and municipalities are having to deal with the expensive disposal of household hazardous waste ...
Several chemicals in cleaning products — including ones that contain enzymes or quaternary ammonium, which is usually used in all-purpose cleaners — can irritate a person’s nose and throat ...
Operative temperature is used in heat transfer and thermal comfort analysis in transportation and buildings. [10] Most psychrometric charts used in HVAC design only show the dry bulb temperature on the x-axis(abscissa), however, it is the operative temperature which is specified on the x-axis of the psychrometric chart illustrated in ANSI/ASHRAE Standard 55 – Thermal Environmental Conditions ...
Thermal comfort and health science research (using hot plates, thermal manikins and comfort laboratories) in Europe and America later establishes lower surface temperature limits and development of comfort standards. 1950: Korean War wipes out wood supplies for ondol, population forced to use coal.
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